US3394482A - Combined ejector and bolt stop - Google Patents

Combined ejector and bolt stop Download PDF

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US3394482A
US3394482A US619332A US61933267A US3394482A US 3394482 A US3394482 A US 3394482A US 619332 A US619332 A US 619332A US 61933267 A US61933267 A US 61933267A US 3394482 A US3394482 A US 3394482A
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bolt
receiver
stop
ejector
finger
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US619332A
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Joseph A Badali
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Olin Corp
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Olin Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A15/00—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun
    • F41A15/12—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns
    • F41A15/16—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns the ejector being mounted on the breech housing or frame
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/64—Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings
    • F41A3/68—Bolt stops, i.e. means for limiting bolt opening movement

Definitions

  • ABSTRACT OF THE DISCLOSURE A one-piece combined ejector and bolt stop for a firearm comprising a U-shaped member having two projections, one projection adapted to engage the lug of the bolt when the bolt is in its breech open position, and the other adapted to extend into the receiver and through a slot in the bolt to eject a cartridge.
  • This invention relates generally to firearms and more particularly to a combined ejector and bolt stop for bolt action firearms.
  • a second type of bolt stop member includes stop means pivotally mounted in the receiver and adapted to extend thereinto to abut a suitable stop surface on the bolt when the bolt is opened. Pivot means are usually provided to pivot the stop means out of engagement with the bolt to withdraw the same from the receiver.
  • One type of ejector is mounted in the receiver in such a manner as to ejectthe cartridge as soon as the cartridge is free.
  • Another type is mounted in the receiver in a position to extend through a groove in the head of a bolt to contact the head of a cartridge when the bolt is moved into its breech open position.
  • a third type is mounted in a slot on the bolt to one side of the axis thereof and is adapted to contact a portion of the receiver when the bolt is moved into its open position and be moved forward relative to the bolt head to eject a cartridge.
  • the fabrication and mounting of the ejector always required additional machining and assembly operations over and above those required for the bolt stop.
  • a further object of this invention is the provision of a combined ejector and bolt stop which is simple in design and function and easy to assemble.
  • the body means includes a first finger portion adapted to extend into a groove in the head of the bolt 8 to contact the head of the cartridge and eject the same when the bolt is moved into its breech open position.
  • a second finger portion provides a suitable surface adapted to engage the rearward surface of a bolt lug to prevent 3,394,482 Patented July 30, 1968 'ice further rearward movement of the bolt as it is moved into the breech open position.
  • FIGURE 1 is a vertical sectional view taken through the receiver of a firearm incorporating the combined bolt stop and cartridge ejector of the present invention showing a portion of the receiver and bolt cut away;
  • FIGURE 2 is a sectional view taken along the lines 22 of FIGURE 1;
  • FIGURE 3 is a horizontal sectional view taken along the lines 33 of FIGURE 2.
  • the receiver 2 has a barrel 4 suitably attached to the forward end thereof in any acceptable convenient manner.
  • the end of the barrel 4 adjacent the receiver 2 is provided with a cartridge receiving chamber 6.
  • the receiver 2 is provided with an ejection port 8 and an elongated slot 10 in the bottom surface.
  • the median vertical plane of the slot 10 is offset away from the ejection :port 8 relative to a vertical plane passing through the axis of the receiver 2.
  • a bolt 12 is mounted for reciprocal movement in the receiver 2 and includes a bolt head 14 having oppositely disposed lugs 16 received within the opposed grooves 18 in the internal surface of the receiver 2.
  • Horizontally opposed extractor fingers 20 and 21 are positioned on either side of the bolt head 14 with their forward end 15 extending beyond the bolt head 14 and turned inwardly to engage the forward edge of a rim of a cartridge.
  • the bottom surface of the bolt head 14 includes a slot 22 offset relative to a vertical plane passing through the axis of the receiver 2.
  • the body of the bolt 12 immediately to the rear of the slot 22 provides a first camming surface 24.
  • the downwardly and rearwardly tapering portion on the extractor finger 20 provides a second camming surface 26.
  • the combined ejector and bolt stop 28 comprises a generally U-shaped stamping having two sides 30 and 32 and a base 34.
  • a first finger 36, continuous with the first side 30, extends generally forwardly from the base 34 and a second finger 38, continuous with the second side 32, extends generally upwardly and forwardly from the base 34.
  • the combined ejector and bolt stop 28 is positioned within the elongated slot 10 in the bottom surface of the receiver 2 and is pivotally mounted about pin 40.
  • a spring member 42 is coiled about the pin 40 with one end engaging the rearward end of the base 34 of the combined ejector and bolt stop 28 and the other end abutting the receiver 2 adjacent the rearward end of the elongated slot 10. The spring member 42 tends to rotate the combined ejector and bolt stop counterclockwise as viewed in FIGURE 1 about the pin 40, tending to rotate the fingers 36 and 38 up into the receiver 2.
  • the first finger 36 is formed with an upwardly extending claw 43 at its extremity to provide a forward ejector surface 44 and a rearward cam surface 46.
  • the second finger 38 includes a forward bolt stop surface 48 and a rearward cam surface 50.
  • the spring member 42 tends to rotate the fingers 36 and 38 upwardly until the cam surface 50 of the second finger 38 abuts the bottom of the extractor finger 20.
  • the rearward cam surface 50 of the second finger 38 moves up along the cam surface 26 on the extractor finger 20 and the claw 43 moves upwardly into the slot 22 in the bolt head 14. Further rearward movement of the bolt 12 will continue until the rearward surface of lug 16 abuts the forward bolt stop surface 48 of the second finger 38.
  • the claw 43 of the first finger 36 projects beyond the forward face of the bolt head 14 with the forward ejector surface 44 thereof contacting the head of the cartridge.
  • the first finger 36 of the combined ejector and bolt stop 28 is in a plane offset relative to a vertical plane passing through an axis of the receiver 2, when the forward ejector surface 44 contacts the head of the cartridge, it will release the rim portion of the cartridge from the left-hand extractor finger 20 and pivot it about the right-hand extractor finger until the cartridge is freed and can flip out through the ejection port 8.
  • the bolt may be removed by moving it to its breech open position whereupon the claw 43 of the second finger 38 of the combined ejector and bolt stop 28 may be depressed by a blunt instrument until the forward bolt stop surface 48 is pivoted downwardly below the lug 16 on the bolt 12 permitting the bolt 12 to be withdrawn from the end of the receiver 2.
  • a firearm a receiver, a breech bolt mounted in said receiver for movement between a breech open position and a breech closed position, said breech bolt including a body having a slot in its forward end and a pair of opposing lugs projecting outwardly from said body at the forward end thereof, a one-piece, generally U-shaped, combined ejector and bolt stop member pivotally connected to said receiver, said member having a base and two side portions spaced apart transversely of said receiver, said side portions forming projections which extend into said receiver when said breech bolt is in said open position, one of said projections having a claw at its extremity which extends forwardly of said bolt through said slot to effect ejection of a cartridge when said bolt is moved into said breech open position, the other of said projections having a portion extending upwardly into said receiver at one side of said body and having a forward surface to be engaged by the rearward surface of one of said lugs when said bolt is moved into said breech closed position to prevent
  • said breech bolt further includes a pair of extractor fingers mounted on said bolt body in diametrically opposed relationship, with each of said fingers having a forward end portion extending beyond said body and turned inwardly and rearwardly to engage the rim of a cartridge, said means for camming said projections out of the path of said bolt including a cam surface on one of said extractor fingers for engaging the other of said projections upon forward movement of the bolt into the bolt closed position.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

July 30, 1968 J. A. BADAL. 3,394,482
COMBINED EJECTOR AND BOLT STOP v Filed Feb. 28, 1967 INVENTOR. JOSEPH A BADAL/ A TTO/P/VEV United States Patent 3,394,482 COMBINED EJECTOR AND BOLT STOP Joseph A. Badali, Branford, Conn., assignor to Olin Mathieson Chemical Corporation, a corporation of Virginia Filed Feb. 28, 1967, Ser. No. 619,332 2 Claims. (Cl. 42-25) ABSTRACT OF THE DISCLOSURE A one-piece combined ejector and bolt stop for a firearm comprising a U-shaped member having two projections, one projection adapted to engage the lug of the bolt when the bolt is in its breech open position, and the other adapted to extend into the receiver and through a slot in the bolt to eject a cartridge.
This invention relates generally to firearms and more particularly to a combined ejector and bolt stop for bolt action firearms.
One of the most common bolt stops that has been used is the type which utilizes the sear of the trigger mechanism. In such designs, a forward surface on the sear is adapted to be contacted by a stop surface on the bolt upon rearward movement thereof. The bolt may be removed from the receiver by pivoting the trigger to move the sear out of engagement with the bolt stop surface. However, in this type of design, the sear is subjected to impact every time the bolt is opened tending to force the sear out of proper alignment and creating severe wear. A second type of bolt stop member includes stop means pivotally mounted in the receiver and adapted to extend thereinto to abut a suitable stop surface on the bolt when the bolt is opened. Pivot means are usually provided to pivot the stop means out of engagement with the bolt to withdraw the same from the receiver. With this type of design, it is necessary to provide a separate recess in the receiver for reception of the stop means resulting in a more costly operation and assembly.
One type of ejector is mounted in the receiver in such a manner as to ejectthe cartridge as soon as the cartridge is free. Another type is mounted in the receiver in a position to extend through a groove in the head of a bolt to contact the head of a cartridge when the bolt is moved into its breech open position. A third type is mounted in a slot on the bolt to one side of the axis thereof and is adapted to contact a portion of the receiver when the bolt is moved into its open position and be moved forward relative to the bolt head to eject a cartridge. However, prior to this invention, the fabrication and mounting of the ejector always required additional machining and assembly operations over and above those required for the bolt stop.
It is an object of the present invention to provide a low cost combined ejector and bolt stop for use in bolt action firearms.
More particularly, it is an object of the present invention to provide a one-piece combined ejector and bolt stop which may be made from a simple stamping.
A further object of this invention is the provision of a combined ejector and bolt stop which is simple in design and function and easy to assemble.
These and other objects may be accomplished through the provision of a body means pivotally attached to the receiver. The body means includes a first finger portion adapted to extend into a groove in the head of the bolt 8 to contact the head of the cartridge and eject the same when the bolt is moved into its breech open position. A second finger portion provides a suitable surface adapted to engage the rearward surface of a bolt lug to prevent 3,394,482 Patented July 30, 1968 'ice further rearward movement of the bolt as it is moved into the breech open position.
A better understanding of the invention may be gained from the following description of a preferred embodiment and by reference to the accompanying drawing in which:
FIGURE 1 is a vertical sectional view taken through the receiver of a firearm incorporating the combined bolt stop and cartridge ejector of the present invention showing a portion of the receiver and bolt cut away;
FIGURE 2 is a sectional view taken along the lines 22 of FIGURE 1; and,
FIGURE 3 is a horizontal sectional view taken along the lines 33 of FIGURE 2.
Referring to the drawing, the receiver 2 has a barrel 4 suitably attached to the forward end thereof in any acceptable convenient manner. The end of the barrel 4 adjacent the receiver 2 is provided with a cartridge receiving chamber 6. The receiver 2 is provided with an ejection port 8 and an elongated slot 10 in the bottom surface. The median vertical plane of the slot 10 is offset away from the ejection :port 8 relative to a vertical plane passing through the axis of the receiver 2.
A bolt 12 is mounted for reciprocal movement in the receiver 2 and includes a bolt head 14 having oppositely disposed lugs 16 received within the opposed grooves 18 in the internal surface of the receiver 2. Horizontally opposed extractor fingers 20 and 21 are positioned on either side of the bolt head 14 with their forward end 15 extending beyond the bolt head 14 and turned inwardly to engage the forward edge of a rim of a cartridge. The bottom surface of the bolt head 14 includes a slot 22 offset relative to a vertical plane passing through the axis of the receiver 2. The body of the bolt 12 immediately to the rear of the slot 22 provides a first camming surface 24. The downwardly and rearwardly tapering portion on the extractor finger 20 provides a second camming surface 26.
The combined ejector and bolt stop 28 comprises a generally U-shaped stamping having two sides 30 and 32 and a base 34. A first finger 36, continuous with the first side 30, extends generally forwardly from the base 34 and a second finger 38, continuous with the second side 32, extends generally upwardly and forwardly from the base 34. The combined ejector and bolt stop 28 is positioned within the elongated slot 10 in the bottom surface of the receiver 2 and is pivotally mounted about pin 40. A spring member 42 is coiled about the pin 40 with one end engaging the rearward end of the base 34 of the combined ejector and bolt stop 28 and the other end abutting the receiver 2 adjacent the rearward end of the elongated slot 10. The spring member 42 tends to rotate the combined ejector and bolt stop counterclockwise as viewed in FIGURE 1 about the pin 40, tending to rotate the fingers 36 and 38 up into the receiver 2.
The first finger 36 is formed with an upwardly extending claw 43 at its extremity to provide a forward ejector surface 44 and a rearward cam surface 46. The second finger 38 includes a forward bolt stop surface 48 and a rearward cam surface 50.
When the bolt 12 is closed, the spring member 42 tends to rotate the fingers 36 and 38 upwardly until the cam surface 50 of the second finger 38 abuts the bottom of the extractor finger 20. As the bolt 12 is moved into its breech open position, the rearward cam surface 50 of the second finger 38 moves up along the cam surface 26 on the extractor finger 20 and the claw 43 moves upwardly into the slot 22 in the bolt head 14. Further rearward movement of the bolt 12 will continue until the rearward surface of lug 16 abuts the forward bolt stop surface 48 of the second finger 38. At the same time, the claw 43 of the first finger 36 projects beyond the forward face of the bolt head 14 with the forward ejector surface 44 thereof contacting the head of the cartridge. Since the first finger 36 of the combined ejector and bolt stop 28 is in a plane offset relative to a vertical plane passing through an axis of the receiver 2, when the forward ejector surface 44 contacts the head of the cartridge, it will release the rim portion of the cartridge from the left-hand extractor finger 20 and pivot it about the right-hand extractor finger until the cartridge is freed and can flip out through the ejection port 8.
The bolt may be removed by moving it to its breech open position whereupon the claw 43 of the second finger 38 of the combined ejector and bolt stop 28 may be depressed by a blunt instrument until the forward bolt stop surface 48 is pivoted downwardly below the lug 16 on the bolt 12 permitting the bolt 12 to be withdrawn from the end of the receiver 2.
While reference has been made to a preferred embodiment of the invention, it will be appreciated that various modifications and alterations will readily suggest themselves to those skilled in the art. Accordingly, the scope of this invention should be ascertained by reference to the following claims.
What is claimed is:
1. In a firearm: a receiver, a breech bolt mounted in said receiver for movement between a breech open position and a breech closed position, said breech bolt including a body having a slot in its forward end and a pair of opposing lugs projecting outwardly from said body at the forward end thereof, a one-piece, generally U-shaped, combined ejector and bolt stop member pivotally connected to said receiver, said member having a base and two side portions spaced apart transversely of said receiver, said side portions forming projections which extend into said receiver when said breech bolt is in said open position, one of said projections having a claw at its extremity which extends forwardly of said bolt through said slot to effect ejection of a cartridge when said bolt is moved into said breech open position, the other of said projections having a portion extending upwardly into said receiver at one side of said body and having a forward surface to be engaged by the rearward surface of one of said lugs when said bolt is moved into said breech closed position to prevent further rearward movement of said bolt, means for urging said projections into a position wherein they extend into said receiver, and means for camming said projections out of the path of said bolt when said bolt is moved into said breech closed position. 2. The firearm of claim 1, wherein said breech bolt further includes a pair of extractor fingers mounted on said bolt body in diametrically opposed relationship, with each of said fingers having a forward end portion extending beyond said body and turned inwardly and rearwardly to engage the rim of a cartridge, said means for camming said projections out of the path of said bolt including a cam surface on one of said extractor fingers for engaging the other of said projections upon forward movement of the bolt into the bolt closed position.
References Cited UNITED STATES PATENTS 157,783 12/1874 Berdan.
431,668 7/1890 Mauser.
804,699 11/ 1905 Benet et al 4225 1,335,063 3/1920 Lewis 4225 1,566,877 12/1925 Johnson.
2,204,289 6/ 1940 Williams 4225 2,344,563 3/1944 Punsalan 4225 2,465,553 3/1949 Robinson 4225 2,618,878 11/1952 Mulno 4225 X FOREIGN PATENTS 618,390 12/1926 France.
BENJAMIN A. BORCHELT, Primary Examiner.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756119A (en) * 1969-09-12 1973-09-04 Colt Ind Operating Corp Machine gun
FR2571840A1 (en) * 1984-10-16 1986-04-18 Sturm Ruger & Co SEMI-AUTOMATIC FIREARM
EP0309438A1 (en) * 1987-09-22 1989-03-29 Steyr-Daimler-Puch Aktiengesellschaft Automatic hand-gun
US20220364810A1 (en) * 2020-07-15 2022-11-17 Stenzel Innovations Company Firearm with combined bolt catch and ejector

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US157783A (en) * 1874-12-15 Hieam bee-dan
US431668A (en) * 1890-07-08 Paul mauser
US804699A (en) * 1904-12-12 1905-11-14 Laurence V Benet Cartridge-case extractor.
US1335063A (en) * 1919-08-06 1920-03-30 Harry A Lewis Ejector for rifles
US1566877A (en) * 1925-10-22 1925-12-22 Winchester Repeating Arms Co Bolt-action firearm
FR618390A (en) * 1925-04-27 1927-03-08 Ceskoslovenska Zbrojovka Akcio cartridge case ejector for firearms
US2204289A (en) * 1931-02-07 1940-06-11 David M Williams Extractor mechanism for firearms
US2344563A (en) * 1942-01-05 1944-03-21 Leon F Punsalan Ejector
US2465553A (en) * 1946-02-27 1949-03-29 Marlin Firearms Co Cartridge extractor construction for firearms
US2618878A (en) * 1949-12-27 1952-11-25 Harrington & Richardson Arms C Unitary trigger, sear, bolt stop, and cartridge ejector

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US157783A (en) * 1874-12-15 Hieam bee-dan
US431668A (en) * 1890-07-08 Paul mauser
US804699A (en) * 1904-12-12 1905-11-14 Laurence V Benet Cartridge-case extractor.
US1335063A (en) * 1919-08-06 1920-03-30 Harry A Lewis Ejector for rifles
FR618390A (en) * 1925-04-27 1927-03-08 Ceskoslovenska Zbrojovka Akcio cartridge case ejector for firearms
US1566877A (en) * 1925-10-22 1925-12-22 Winchester Repeating Arms Co Bolt-action firearm
US2204289A (en) * 1931-02-07 1940-06-11 David M Williams Extractor mechanism for firearms
US2344563A (en) * 1942-01-05 1944-03-21 Leon F Punsalan Ejector
US2465553A (en) * 1946-02-27 1949-03-29 Marlin Firearms Co Cartridge extractor construction for firearms
US2618878A (en) * 1949-12-27 1952-11-25 Harrington & Richardson Arms C Unitary trigger, sear, bolt stop, and cartridge ejector

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756119A (en) * 1969-09-12 1973-09-04 Colt Ind Operating Corp Machine gun
FR2571840A1 (en) * 1984-10-16 1986-04-18 Sturm Ruger & Co SEMI-AUTOMATIC FIREARM
DE3536125A1 (en) * 1984-10-16 1986-05-07 Sturm, Ruger & Co. Inc., Southport, Conn. SEMI-AUTOMATIC FIREARM
US4627184A (en) * 1984-10-16 1986-12-09 Sturm, Ruger & Company, Inc. Ejector manually operable to rotate firing pin block for slide removal and disassembly
AU577893B2 (en) * 1984-10-16 1988-10-06 Sturm, Ruger & Company, Inc Ejector for semi-automatic pistol
DE3536125C2 (en) * 1984-10-16 1997-11-20 Sturm Ruger & Co Firing pin / slide release for a firearm
EP0309438A1 (en) * 1987-09-22 1989-03-29 Steyr-Daimler-Puch Aktiengesellschaft Automatic hand-gun
US4899477A (en) * 1987-09-22 1990-02-13 Steyr-Daimler-Puch Ag Hand-held automatic firearm
US20220364810A1 (en) * 2020-07-15 2022-11-17 Stenzel Innovations Company Firearm with combined bolt catch and ejector

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